混流谷物干燥机的模型与模拟

MODELLNG AND SIMULATION OF MIXED FLOW GRAIN DRYER

在谷物和气流流动模拟的基础上，建立了混流谷物干燥机的二维干燥模型和模拟方法，编制了混流谷物干燥机模拟软件ＭＦＧＤＳ。对模拟结果进行了实验验证，并与已有的模拟方法进行了比较。本文的模型和方法将混流干燥机模拟从一维近似模拟提高到二维精确模拟的水平，并具有精度高、速度快、功能强的特点。

Mixed flow grain dryer is one of the most widely used grain dryers China. Owing to thenonlinear grain and air flow in the drye,t is very difficult to simulate the drying process. Based on the analysis of grain and air flow,a 2-dimensional drying model and simulationmethod of mixed flow grain dryer are developed and verified in this paper. Program ofMFGDS(Mixed Flow Grain Drying Simulation)is accomplished.It can be run in computerwith fairly great speed.By using this program,the grain temperature and moisture,the airtemperature and humidity at any position within the dryer may be accurately predicted.Withthe study,the simulation of mixed flow grain dryer has been improved from 1-dimensional to2-dimensional level.Itcan be used in design,performance prediction and simulation study ofgrain dryers.